Replaceable jaw for wrenches



A- J. MATTER REPLACEABLE JAW FOR WRENCH ES July 14, 1953 Filed Oct. 3, 1951 Patented July 14, 1953 UNITED STATES, PATENT OFFICE 3 Claims.

My invention relates to improvements in replaceable jaws for wrenches such as pipe wrenches and has for its object to provide a rectangular jaw which can be made from bar stock at much lower costthan the usual forged steel Jaws.

Another object is to provide simple means for holding the jaw within a dovetailed recess in a wrench part without drilling for pins or screws, said recess requiring only a one way breaching or milling operation.

Another object is to provide a relatively thin rectangular jaw without outstanding lugs or tongues so as to take up a minimum of jaw space when used in the outer or hook end of a pipe wrench or similar tool.

I attain these objects by means of the structures shown in the accompanying drawings, in

which- Fig. 1 shows the end'of a pipe wrench with the jaws in place.

Fig. 2 is a sectional elevation through one of the jaws and hook end of the wrench taken on the line 2-2 in Fig. 1.

Fig. 3 is a front elevation of a replaceable jaw and the jaw holder.

Fig. 4 shows an end view of the same.

Fig. 5 is a rear elevation of Fig. 3.

Similar numerals throughout the several views refer to similar parts.

In Fig. 1 is shown a pipe-wrench handle portion l assembled with a hook portion 2, each being provided with dovetailed recesses 3 in which replaceable jaws 4 are held rigidly in place by holders 5 having jaw retaining ears 6 and wrench retaining ears 'I.

Jaws d are rectangular in shape and rovided with gripping teeth 4a on one face, and beveled end 4?).

It will be noted that in manufacturing the jaws the teeth and bevelled ends can be milled and severed from bar stock in one pass. Several bars can be milled at one time with no secondary operations on the jaws.

The holders 5 may be stamped from sheet metal and are provided with ears 6 and 1.

As stamped the ears 6 are formed at right angles to the stamping body to fit the jaws snugly.

One of the ears I is preferably formed at right angles to the stamping body and the other is left fiat to permit assembly of the holder and jaw as a unit ready to slide into a dovetailed recess in a wrench. After assembly in a wrench the remaining unbent ear I is hammered down so as to retain the jaw and holder unit in place.

To remove a worn jaw one of the ears 1 may be pried up so as to permit driving out the jaw and holder.

To prevent accidental contact with the ears of plate adapted to fit the back of said jaw, with ears adapted to engage the sides of the jaw and ears adapted to engage the edges of a dovetailed recess .provided in the tool to receive said jaw for the purpose of holding the said jaw in said recess.

2. The combination with a gripping jaw"hav ing beveled ends adapted to fit in a dovetailed recess in a tool, of a holder adapted to fit between the said jaw and the bottom of said recess and having ears extending outward along the sides of said jaw and bendable ears adapted to be formed inwardly to engage edges of the said recess for the purpose of rigidly holding the jaw in the recess.

3. A replaceable hand tool jaw of rectangular cross-section having one flat face and its opposite face toothed for gripping a work piece and having parallel beveled ends adapted to fit within a dovetailed recess, in combination with a plate-like holder having jaw engaging ears and recess-edge. engaging ears adapted to hold the jaw within said recess as described.

ALBERT J. MATTER.

. References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 187,287 Leland Feb. 13, 1877 599,001 Leonard Feb. 15, 1898 911,924 Vader Feb. 9, 1909 I 985,028 Green Feb. 21, 1911 1,281,294 Clooney Oct. 15, 1918 1 ,307,049 I-Iohnsheen June 17, 1919 1,504,870 Coughlin Aug. 12, 1924 1,603,079 Hinds Oct. 12, 1926 1,866,426 Siegrist July 5, 1932 FOREIGN PATENTS Number Country Date 303,313 Great Britain Jan. 3, 1929 

